China Insert Manufacturers, Suppliers, Company - Factory Product Details. Product Description. 1.8-425 Standard autosampler vials (11.6*32mm) for GC and HPLC. 2.Available with black or white screw caps with 8-425 thread. 3.Available as closed top screw seals or with centre hole. 4.Vials are manufactured of Clear or Amber borosilicate glass.